diff --git a/src/algorithms/signal_source/adapters/fmcomms2_signal_source.cc b/src/algorithms/signal_source/adapters/fmcomms2_signal_source.cc
index 9a7b9213f..de447a0e3 100644
--- a/src/algorithms/signal_source/adapters/fmcomms2_signal_source.cc
+++ b/src/algorithms/signal_source/adapters/fmcomms2_signal_source.cc
@@ -331,6 +331,15 @@ Fmcomms2SignalSource::Fmcomms2SignalSource(const ConfigurationInterface *configu
             file_sink_ = gr::blocks::file_sink::make(item_size_, dump_filename_.c_str());
             DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
         }
+
+    if (in_stream_ > 0)
+        {
+            LOG(ERROR) << "A signal source does not have an input stream";
+        }
+    if (out_stream_ > 1)
+        {
+            LOG(ERROR) << "This implementation only supports one output stream";
+        }
 }